Two-photon coincidence studies of highly-charged ion relaxation in solidsZ. D. Pešić, Gy. Vikor, H. Hanafy, A. Enulescu and R. SchuchEur. Phys. J. D, 54 3 (2009) 623-628DOI: https://doi.org/10.1140/epjd/e2009-00206-6